Pipe-cutter.



R EOK PIPE GUTTER'. rrnlcuron FILED JULY 17,1901.

' Panteamay1s,19o9.

walkman". nV c.

UNITED STATES IATEN T OFFICE.

RAGNVALD ECK, Ol" CHICAGO, ILLINOIS, ASSIGNOR, BY DIRECT AND MESNE ASSIGNMENTS, OF ONE-HALF TO WILLIAM I). CROUKETT, Ol" CHICAGO, ILLINOIS, AND ONE-HALF TO THE EOK TOOL COMPANY, OF CHICAGO, ILLINOIS7 A (DORIORATION 0F ILLINOIS.

PIPE-CUTTER.

To all whom it may concern:

Be it known that I, RAGNVALD Een, a citizen of the United States, residin at Chicago, in the county of Cook and tate of Illinois, have invented a new and useful Improvement in Pi e-Cutters, of which the following is a speci cation.

My invention relates to that class of pipecutters which is intended for use in cutting metallic pipes. In the use of pipe-cutters of this class heretofore constructed, each of the several ends of a pipe is necessarily beveled at the time, and by the act of cutting, and an inturned annular flange or featheredge is then formed which reduces, to a lgreater or less extent, the diameter of the ore of the pi e at such ends, according to the degree of ardness of the metal of the pipe and the condition ofthe cutter. Whenever it is desired to have a bore of uniform diameter throughout the pipe and to have the same free from all obstructions as well as to have the end square (rather than beveling) it is necessary to finish the end of the ipe usually by filing and reaming. This e uires a second o eration and materially ad s to Athe cost of t e product.

The object of my invention is to overcome these objections and to provide a pipe-cutter which, in operation, so'cuts the pipe that each of the severed ends is s uare and left free from feather-edges at its ore.

Referring to the accompanying drawings: Figure 1 is a side elevation of my improved pipe-cutter with a pipein position for cutting' Fig. 2, abroken lan section taken at the line 2 on Fig. 1; ig. 3, a transverse sectional view taken at the line 3 on Fig. 1;

. Fig. 4, a plan section taken at the line 4 on Fig. 1; Fig. 5, an enlarged sectional view of one of the cutting-disks; Fig. 6, a broken section of a pipe illustrating the cut made with my improved pipe-cutter; and Fig. 7, a similar view to that .presented by Fig. 5 illustrating the cut made with other cutters.

The pipe-cutter is provided withV a cuttercarrying frame-7, having at one end a stationary 'aw 8 recessed at its inner side, and within t e recess .9 are two rotary cuttingdisks 11 mounted upon pins or shafts 10. These cuttin -disks are spaced a art as to be equidistant rom the vertical ongitudinal Vcenter of the device, and are confined to ro- Specication of Letters Patent.

Application filed July 17, 1907.

Patented May 18, 1909.

Serial N0. 384,187.

tate freely upon their respective shafts, by washers or spacers 12 and 13 surrounding the shafts and interposed between the disks and the sides of the recess 9. 'Ihe cuttingdisks are beveled as shown at 11a to a knife-edge, upon their adjacent or inner faces, while their opposite, or outer faces, are made very slightly concave or dish-shaped as shown at 11b represented in Fig, 5 of the drawing, wherein this concavit is shown of somewhat exaggerated forni. he opposite end of the frame 7 terminates in a stationar head bi furcated transversely to form a soc et within which is confined a nut 14 held against turning by its engagement with the web 15. This nut is provided with a longitudinal screw-threaded opening 16 in alinemeiit with openings or holes 17 in the furcations of the head. A screw-threaded rod 18 rovided with a handle 19 passes through the ioles 17 in which it has a bearing, and also through the nut 14 with which it has a threaded engagement, and enters a sliding head 19 to which it is held by a pin 20 against withdrawal, but ermitted tol rotate freely therein. The s iding head is provided at one endwith ears 21 formin between them arecess within which is pivotalIy secured by means of a pin 22, a jaw 23 carrying rolls 24. A sleeve 25 surrounds the pin 22 and is made conical or tapering from a larger diameter at its center to a smaller diameterat each of its ends, whereby the jaw 23 isallowed to swing slightly to either side of the longitudinal center in a horizontal plane, and at the same time to rotate slightly u on the ivot-pin 22, for the pu ose hereina ter exp ained. The slidin hea is mounted upon the frame 7 to slide Freely thereon, upon the manipulation of the screw 18 as is common in devices of this class.

The operation of my im roved ipe-cutter is practically the same as t at of ot ers which are in general use; the pipe is clamped between the cutting-disks 11 and rolls 24 through the medium of the screw 18, as is shown in Fig. 1, until sufficient ressure is exerted upon the pipe b the rol and cutting-disks, whereu on t e operator rotates the cutter aroun the pipe. This action causes the cutting-disks to cut into the pipe, and after one ortwo revolutions ofthe device the screw is again turned to again exert pressure of the rolls and cutting-disks upon the pipe when the device is rotated as before. l`his process is repeated until the pipe has been completely severedA As before stated, the cutting-disks are mounted (-quidistant from the vertical longitudinal center of the device with their inner faces beveled, as shown in l-figs. 2 and 3, and with their outer faces slightly concave or dish-shaped. The cutting-disks being thus positioned, it is obvious that in operation two cuts will be made simultaneously around the pipe, and the cutting-disks being thus formed, the severed ends of the pipe adjacent to the )e1-pendienlar face of each cutting-disk will be square, that is, thc end of the pi )c will be at rightangles to the longitudina axis of the same. And in cutting a pipe with my device the bore of the pipe at the severed end is left free of all obstructions, such as the inturned annular flange or feather-edge which is always present when a pipe is cut with a cuttin -disk iaving a V-shaped cutting-edge, thus o viating the necessity of finishing the end of the ipe after it has been cut. The metal whici is displaced by the cutting-disks as they advance in making the cuts is forced by the bevel-edge of each cuttin -disk longitudinally of the ipe toward 51e center of that part of the pipe between the cuts in the manner shown 1n Fig. 6, instead of being forced toward the center of the pi e, as shown in Fig. 7, as is the case when t e cut is made with a V-shaped cutting-disk. The section of pipe between the cuts is waste and may be disposed of as such. The face erendicular to the axis) of each cuttingisk 1s referably made concave, or dish-shape, to a ord clearance between that face of the disk and the metal of the ipe to thereby reduce the friction between t e two surfaces, which otherwise would be occasioned, but this is not absolutely essential.

Where two cutting-disks are used in a device of this class, it 1s desirable to prevent a torsional movement of the device around the pipe during the process of cutting, as such movement tends to injure the cutting-disks. This strain may occur if the pipe is forced against the cutting-disks by a stationary roll or rolls bearing against the pipe, because then imperfections and irregularities in the surface of the pipe may be encountered by the roll or rolls 1n the rotation of the device around the pipe so as to produce irregular motion. To prevent this torsional strain, l prefer to mount the rolls 24 in a jaw, which is pivoted to the sliding head in suchI a manner as to permit a limited universal' movement, whereby the rolls may oscillate when they encounter uneven surfaces in rolling about the pipe.

l realize that considerable variation is possible in the construction of my improved device without departing from the spiritv of my invention, and l. do not intend, therefore, to limit inysell' to the particular 'orm herein shown and described.

l claim as new, and desire to secure by Letters Patent:

1. ln a pipe-cutter, a truste-conical disk provided with a cutting edge and having its ase concave, means vfor pressing said disk against the pipe to be operated upon with the base of said disk substantially at rightangles to the axis of the pipe, and means whereby a relative movement ol' revolution can he unparted to the disk and pipe.

2. ln a pipe-cutter, the combination with a frame havlng a stationary jaw, and a sliding head adapted to be moved upon the frame, ol' a cuttingr disk mounted upon one of.

said members having one of its faces concave and its opposite face beveled to form a knifeedge, and means for advancing and retracting the sliding head, for the purpose set forth.

3. In a pipe-cutter, the combination with a frame having a stationary jaw, and a sliding head adapted to be moved upon the frame, of cuttlng disks mounted upon one of said members, each disk having its outer face Substantially erpendicular to its axis and its inner face eveled to form a knifeedge, a pair of rolls mounted upon the other of said members to have a universal movement thereon, and means for advancing and retracting the sliding head, for the purpose set forth.

4. In a pipe-cutter, the combination with a frame having a stationary jaw, and a sliding head adapted to be moved upon` the frame, of cutting disks mounted upon one of said members, each disk having its outer face substantially `erpendicular to its axis and its inner face Fbeveled: to form a knifeedge, a pair of rolls mounted within a swinging jaw and pivoted to the other of said members to oscilla-te in one direction around the pivot, a sleevel tapering from a large diameter at its center to a smaller diameter at each of its ends and interposedv between said pivot and sWin ing jaw whereby said rolls can swing at right-angles to said oscillations, and means for advancingand retracting said slidingv head, for the purpose set forth.

5. In a pipe-cutter, the combination with a frame havlng a stationary jaw, and a sliding head adapted to be moved upon the frame, of cutting disks spaced apart and mounted' upon said jaw, each disk having an outer concave facesubstantially perpendicular to its axis and its inner face beveled. to form a knife-edge, a pair of rolls mounted within a swinging jaw and pivoted to the sliding head to oscillate in one direction, a sleevel having its sides converging trom a larger diameter to a smaller diameter at each end andinterposed between said pivot andi swinging jaw whereby said rolls can swing at edge, the base of each being concave and.

iight-angles to said oscillations, and means for advancing and reti-acting said sliding head, for the purpose set forth.

6. In a pipe-cutter, the combination with a frame having a stationary jaw at one end, a bifurcated head. at the other end, the furcations provided with holes through their ends, a nut confined against rotation and I longitudinal movement buv contact with the frame at one of its sides and with said turcations at its ends, a sliding head mounted upon the frame between its ends and adapted to be moved thereon, cutting;r disks mounted. upon said stationary jaw and to rotate thereon, a pair of rollers mounted upon the sliding head to have universal movement thereon, a screw-threaded rod provided with a handle and passing through said nut and the holes in the 'uxcations and havinU one end rotatably confined within said sliding head and adapted to advance and retract said head, for the purpose set forth.

7. In a pipe-cutter, two frusto-conieal disks spacer apart each having a cutting facing voutward and substantially at rightangles to the axis of the pipe, and with their eonieai surfaces facing inward whereby the distorted metal is therebyY forced longitudinellyY of the pipe toward a central parallel plane between said disks, interchangeable sparing-washers adpted to vary the relative spacing apart of sai disks, means for pressin` said cutting disks against the )ipe to bc operated upon, and means whereby a relative movement of revolution can be imparted to the disks and pipe.

S. ln a pipe-cutter, two truste-conical disks adjustably spaced apart, each having a cutting edge and the base of each being concave, means for pressing said cutting disks against the pipe to be operated upon, and means wher-eb)T a relative movement of revolution can he imparted to the disks and pipe.

RAGNVALD EUK. in presence of'- RALPH SUIIAEFER, J. H, LANDES. 

